Fixed MFCC test
Fixed MFCC test

Change-Id: I49290506194d1c09a3e86eacd373183d2b706d73

Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction